mcdevitt



(No Model.)

. M. MARSHALL 8v H. J. MGDEVITT.

SAW SET.

Patented Dec. 13,1881.

wizzwaed I UNITED STATES PATENT OFFICE.

MARTIN MARSHALL AND HUGH J. MODEVITT, OF PHILADELPHIA, PA.

SAW-

SPECIFICATION forming part of Letters Patent No. 250,932, dated December13, 1881,

Application filed July 8, 1881.. (No model.)

.To all whom it may concern Be it known that we, MARTIN MARSHALL andHUGH J. MODEVITT, citizens of the United States, residing atPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented a new and useful Improvement in Saw-Sets, of which thefollowing is a specification.

The object of our invention is such a hand and portable saw-set whichmay be cheaply made and convenient in operation, and not liable to getout of order; and the nature of our invention consists as follows: Thestanding part of the saw-set is in two pieces, connected together so asto receive the blade of a saw between their ends, one piece beingadjustable, as hereinafter drscribed, to vary the distance between thetwo pieces in adaptation to various thicknesses of saws. The punches arecaused to approach each other at opposite sides of the saw for settingtwo teeth at one operation by means of a lever having arms at oppositesides, one of which is connected immediately with one of the punches,and the other by means of a connecting-rod with a slide for operatingthe other punch, which has a lateral adjustment with said slide, ashereinafter fully described, in adaptation to the different pitches ofthe teeth of the saws.

In the accompanying drawings,which make a part of this specification,Figure 1 is a plan View of our improved saw-set. Fig. 2 is an edge viewof the same. Fig. 3 is a bottom view. Fig. 4 is an end view of thecasting A. Fig. 5 is a like view of the slide 1). Fig. 6 is across-section of the saw-set, taken at the line a: w of Fig. 2, lookingin the direction of the arrows. Fig. 7 is a perspective view of thepunch C. Fig. Sis a like view of the punch 0. Fig. 9 is a partiallongitudinal section at the line 3/ y of Fig. 1.

Like letters of reference in all the figures indicate the same parts.

The standing parts of the saw-set to which all the movable parts areconnected are composed of the castings A and A and the bars b 12. Oneend of each bar is connected permanently to the casting A, and the otherend is fastened to the casting A by means of screws 0, which passthrough longitudinal slots d of the bars, for the purpose of making thecasting A adjustable to accommodate saws of different thickness.

The casting A is provided with a punch, O, and the casting A with apunch, O, which is adapted to slide in the opening 0 of the inner end ofthe casting, the head f of the punch being movable transversely in theslide D, which has a longitudinal movement between the bars b b, abovedescribed, and similar bars, I) b, at the lower part of the said castingA, the adj ustment of the head being made as occasion may require inadaptation to the pitch of the teeth of different saws, the transverseadj ustment being effected by means of the screw-rod E, located in thegroove 9 in the under side of the slide, so as to turn freely thereinwithout touching the sides" of the groove, while the threads of the rodwork in the nut of the head f. The ends of the rod have their bearingsinthe detachable plates h h on the vertical sides of the slide D.

The inner ends of the castings A and A have bevel seats at the points 1and 2 to correspond with the bevels of the punches O and O. Movementsare given to said punches simultaneously for alternately setting theteeth and withdrawing the punches therefrom by means of the lever G, asthe handle 1' of the lever and the handle z" of the casting A aregrasped with one hand, whereby the arm j of the lever, (as the latterhas a partial turn on the fulcrum-pin 7a,) by being confined at itslower end in the cross-groove lof the punch O, operates the latter, andthe arm j operates the slide D through the intermediate connecting-rodH, and thus gives the longitudinal movement to the punch 0, whereby thetwo teeth operated upon are set in opposite directions to each other. Bya reverse movement of the lever the punches are returned to their formerposition (seen in the drawings) preparatory for setting the next pair ofteeth and the operation is in like manner continued until the setting iscompleted.

We claim as our invention-- 1. The combination of the casting A with thecasting A by means of the bars I) b, permanently connected at one endwith the casting A. and at their other end to the casting A by means ofscrews cpassing through slots 01 in said bars 1), whereby the casting Ais ad- A,and punch O with the casting A, punch G, slide D, having agroove, g, and screw-rod E, substantially in the manner and for thepurpose described.

MARTIN MARSHALL. HUGH J. MGDEVITT.

Witnesses: I

THOMAS J. BEWLEY, STEPHEN Us'rIoK.

